[gpfsug-discuss] migrating data from GPFS3.5 to ESS appliance (GPFS4.1)

[Oesterlin, Robert]

Not talking about ESS specifically, but It’s not possible to change the block size of an existing file system – you are pretty much stuck with file copy. Something I wish IBM would address, I’d love to change the block size of some of my file system too.

Bob Oesterlin
Sr Storage Engineer, Nuance HPC Grid
507-269-0413


From: <gpfsug-discuss-bounces at spectrumscale.org<mailto:gpfsug-discuss-bounces at spectrumscale.org>> on behalf of Damir Krstic <damir.krstic at gmail.com<mailto:damir.krstic at gmail.com>>
Reply-To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>>
Date: Friday, January 29, 2016 at 1:31 PM
To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>>
Subject: [gpfsug-discuss] migrating data from GPFS3.5 to ESS appliance (GPFS4.1)

We were planning of adding ESS to our existing GPFS cluster and adding its disks and then deleting our old disks and having the data migrated this way. However, our existing block size on our projects filesystem is 1M and in order to extract as much performance out of ESS we would like its filesystem created with larger block size. Besides rsync do you have any suggestions of how to do this without downtime and in fastest way possible?
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